1DMC

THE THREE-DIMENSIONAL SOLUTION STRUCTURE OF CALLINECTES SAPIDUS METALLOTHIONEIN-I DETERMINED BY HOMONUCLEAR AND HETERONUCLEAR MAGNETIC RESONANCE SPECTROSCOPY


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional solution structure of Callinectes sapidus metallothionein-1 determined by homonuclear and heteronuclear magnetic resonance spectroscopy.

Narula, S.S.Brouwer, M.Hua, Y.Armitage, I.M.

(1995) Biochemistry 34: 620-631

  • Primary Citation of Related Structures:  1DMD, 1DME, 1DMF

  • PubMed Abstract: 
  • Metallothionein is a cysteine-rich metal-binding protein whose biosynthesis is closely regulated by the level of exposure of an organism to zinc, copper, cadmium, and other metal salts. The metallothionein from Callinectes sapidus is known to bind si ...

    Metallothionein is a cysteine-rich metal-binding protein whose biosynthesis is closely regulated by the level of exposure of an organism to zinc, copper, cadmium, and other metal salts. The metallothionein from Callinectes sapidus is known to bind six divalent metal ions in two separate metal-binding clusters. Heteronuclear 1H-113Cd and homonuclear 1H-1H NMR correlation experiments have been used to establish that the two clusters reside in two distinct protein domains. The three-dimensional solution structure of the metallothionein has been determined using the distance and angle constraints derived from these two-dimensional NMR data sets and a distance geometry/simulated annealing protocol. There are no interdomain short distance (< or = 4.5 A) constraints observed in this protein, enabling the calculation of structures for the N-terminal, beta domain and the C-terminal, alpha domain separately. A total of 18 structures were obtained for each domain. The structures are based on a total of 364 experimental NMR restraints consisting of 277 approximate interproton distance restraints, 12 chi 1 and 51 phi angular restraints, and 24 metal-to-cysteine connectivities obtained from 1H-113Cd correlation experiments. The only element of regular secondary structure in either of the two domains is a short segment of helix in the C-terminal alpha domain between Lys42 and Thr48. The folding of the polypeptide backbone chain in each domain, however, gives rise to several type I beta turns. There are no type II beta turns.


    Related Citations: 
    • Establishment of Two Distinct Protein Domains in Blue Crab Callinectes Sapidus Metallothionein-I Through Heteronuclear (1H-113Cd) and Homonuclear (1H-1H) Correlation NMR Experiment
      Narula, S.S.,Brouwer, M.,Armitage, I.M.
      (1993) Magn.Reson.Chem. 31: 96
    • Three-Dimensional Structure of Human [113Cd-7] Metallothionein-2 in Solution Determined by Nuclear Magnetic Resonance Spectroscopy
      Messerle, B.A.,Schaeffer, A.,Vasak, M.,Kaegi, J.H.R.,Wuthrich, K.
      (1990) J.Mol.Biol. 214: 765


    Organizational Affiliation

    Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CD6 METALLOTHIONEIN-1
A
31Callinectes sapidusN/A
Find proteins for P55949 (Callinectes sapidus)
Go to UniProtKB:  P55949
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

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Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-02-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance